What's the stack trace when you get an NPE? (pst *e) Are you shadowing a core function with your own `count` or something like that?
On Friday, February 15, 2019 at 8:27:55 AM UTC-6, KJO wrote: > > Hi- > > This one has me stumped. The following code snippet throws a > NullPointerException and I just can't understand how it could. > > (if (set? t-val) > (println t-val (type t-val))) > > It seems that if it's a set, it should have a set type. > > If I change the code to > > (if (set? t-val) > (println t-val (count t-val))) > > It throws a ClassCastException > with java.math.BigDecimal cannot be cast to clojure.lang.IFn > > The println is only there for debugging. I was seeing the count function > throwing an exception further down in the code, and I couldn't understand > why. Any ideas? > > t-val is defined in a let, but if I take it out and use the original > value, the result is the same. I'm afraid I can't reproduce the error in > the REPL using any of the values I captured. The only other thing I can > offer is that it's being used in a reducing function over a lazy sequence. > > I'm stumped. > > Thanks > > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
